For example, the PRISM reactor can use all of the plutonium (or unenriched and barely enriched uranium) stored by the British that is currently unusable

If a Fast/Breeder reactor is not used, a reprocessing center could be a good idea

Would allow for independence from France, in that regard

Would allow for fuel that is currently unusable to be usable in a reactor we currently use

Decrease in amount of waste in depositories and from current reactor facilities

However, the US is currently against reprocessing unless for purely scientific purposes with President Obama's position on the subject

Affordability

Size of crew likely much less than estimated on initial PowerPoint

Multiple modular reactors per facility rather than one big reactor, if that's even possible

SMR/MMR's can be produced much easier, faster, and cheaper due to their size and construction techniques as compared to traditional reactors

I also believe a modular reactor would be easier and better suited to adapt to these conditions

Safety

Reactor should have passive safety precautions, best options for reactor types (broad) are GFRs or SFRs according to ASTRID a French undertaking to showcase Gen4 technology (assuming we are using Fast reactors, which I think would be best for long term)

Reactor should not primarily depend on mechanical systems for as many functions and operations as possible

Should not solely depend on US military for protection. I'd advise an alternative security force as well to really ensure safety from attack

Reactor vessel should be kept at least 100 meters deep and a few miles off shore

;At that depth, risk of terrorist attacks by divers is essentially eliminated, leaving only other submersibles and depth charges as means for attacking units

Just about anything that could attempt an attack of this kind could/would be spotted by military, or private security force, before completion

Depth and distance is sufficient to minimize risk of natural disasters harming the vessel

Only natural disaster concern really would be earthquake. Solution: don't place unit near a fault line

Reactor vessel should have a protective net of some sort

Deters wildlife from being too close to vessel

Makes attacking the vessel by people much more difficult

Protective net likely not just a literal translation i.e. something that emits electromagnetic frequencies, most marine life has sensors to detect EMF and could be "persuaded" not to come close

Crew must be trained extensively to handle situations that may arise

Crew should also be interchangeable like on a military submarine

People should be dedicated to developing "War Games" for the crew to test safety readiness